Strap adjuster



FIG. 1 is a left, front, top side perspective view of a strap adjuster, showing my new design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being identical;

FIG. 3 is a front side elevational view thereof;

FIG. 4 is a top plan view thereof, the bottom plan view being identical; and,

FIG. 5 is a rear side elevational view thereof. 

The ornamental design for a strap adjuster, as shown and described. 